Hello all. I know that several people on here have both conditions and I need a bit of advice. I take levothyroxine and metformin. It is well known that metformin will lower the level of tsh and warnings about the interactions of both drugs are in both packets. My last blood tests showed a tsh in normal levels, but I am feeling hypothyroid. All the usual symptoms. Gp said "your levels are fine". I asked how they compensate for the interference of metformin and she didn't know what I was talking about. When I explained she said "well, we will never know, then, will we". And that was that. I had mentioned this to the pharmacist, who told me that the gp would be able to adjust for the interaction. Saw another gp who just said she agreed with the first gp. How do you on both meds deal with this? Many thanks for help.